Species

Centrolepis minima

Etymology

Centrolepis: pointed scale
minima: Very small

Common Name(s)

Centrolepis

Current Conservation Status

2012 - At Risk - Naturally Uncommon

Conservation status of New Zealand indigenous vascular plants, 2012
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2012 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2009 and replaces all previous NZTCS lists for vascular plants. Authors: Peter J. de Lange, Jeremy R. Rolfe, Paul D. Champion, Shannel P. Courtney, Peter B. Heenan, John W. Barkla, Ewen K. Cameron, David A. Norton and Rodney A. Hitchmough. File size: 792KB

Previous Conservation Status

2009 - At Risk - Naturally Uncommon
2004 - Range Restricted

Qualifiers

2012 - Sp

Authority

Centrolepis minima Kirk

Family

Centrolepidaceae

Flora Category

Vascular - Native

Plant Code

CENMNM

Structural Class

Monocotyledonous Herbs

Synonyms

Gaimardia minima (Kirk) Cheeseman; Pseudalepyrum minimum (Kirk) Dandy

Distribution

Endemic. New Zealand: South Island (Westland, Canterbury, Southland, Fiordland).

Habitat

Lowland to subalpine. Aquatic or semi-aquatic, usually partially buried such that only the leaf tips are visible in fine sand and silt along the margin of lakes and small tarns.

Features

Annual, rather gracile and fine-leaved, loosely tufted, often partially or fully submerged herbs forming diffuse patches up to 20 mm high in fine sand and silt. Roots numerous, fine, > upper part of plant. Leaves 5–20 mm long, < 0.5 mm. wide, green or wine-red, crowded at stem base; sheaths transparent, glabrous, slightly wider than lamina. Flowering stems slightly < leaves, c.0.5 mm wide, bright red. Glume-like bracts 2, ± opposite, ovate, papillose, the outer mucronate, almost completely enclosing the smaller obtuse one; each bract enclosing 1, rarely 2 pseudanthia; hyaline scales 0. Male 1 or 0 in a pseudanthium, usually only 1 within each glume-like bract. Female 2–6, superposed in 2 series; styles connate at the base

Similar Taxa

Recognised by the diffuse, tufted rather than cushion forming, annual rather than perennial growth habit and very fine, gracile, green or wine red, densely crowded glabrous leaves. Plants are easily overlooked as they are usually buried in sand or silt such that only the leaf tips are visible.

Flowering

January – March

Fruiting

March – April

Propagation Technique

Difficult. Should not be removed from the wild.

Threats

A Naturally Uncommon, sparsely distributed, range-restricted endemic. There are no obvious threats though potentially it is threatened by introduced aquatic weeds at some sites.

Endemic Taxon

Yes

Endemic Genus

No

Endemic Family

No

Where To Buy

Not commercially available

Attribution

Fact sheet oprepared for NZPCN by P.J. de Lange 14 August 2006. Description adapted from Moore & Edgar (1970)

References and further reading

Moore, L.B.; Edgar, E. 1970: Flora of New Zealand. Vol. II. Government Printer, Wellington.

This page last updated on 26 Sep 2013